| Narvia Direct Ltd. | Transport & logistics | 2013 |
| Nasaar and Co Ltd | Wholesale & retail | 2015 |
| Natalie's Health & Wellbeing Ltd | Health & social care | 2023 |
| Nathan Blacklock Limited | Construction | 2024 |
| Natinel Ltd | Wholesale & retail | 2014 |
| National Centre for Renewable Technology Ltd | Professional & scientific | 2020 |
| National Health Action Party | Other services | 2012 |
| National Motorcycle Accessories Ltd | Wholesale & retail | 2016 |
| National Structural Repairs and Maintenance Ltd | Construction | 2025 |
| National Time Recorder Company Limited | Extraterritorial | 1917 |
| Nationwide Leisure Solutions Ltd | Other services | 2020 |
| Nationwide Packaging & Distribution Limited | Transport & logistics | 2002 |
| Nationwide Tanning Ltd | Other services | 2021 |
| Natural Bodybuilding Worldwide Limited | Arts & recreation | 2022 |
| Natural Host Ltd | Wholesale & retail | 2013 |
| Naughtsxcrosses Limited | Manufacturing | 2016 |
| Navira Global Ltd | Wholesale & retail | 2026 |
| Navishnah Properties Ltd | Real estate | 2025 |
| Nayi Zindagi Community Interest Company | Health & social care | 2021 |
| Nayocode Limited | Information & communication | 2014 |
| NAZ MOT Limited | Professional & scientific | 2024 |
| Nazar Check Ltd | Health & social care | 2024 |
| NB Building & Renovations Limited | Construction | 2026 |
| NBC (Mootings) Limited | Real estate | 2011 |
| NCK Commercials Limited | Manufacturing | 2019 |
| NCR Financial Solutions Group Limited | Professional & scientific | 1946 |
| NCR UK Group Financing Limited | Financial services | 2021 |
| Nebula Nexxus Ltd | Hospitality | 2024 |
| NED Admin Services Limited | Administrative & support | 2025 |
| Needham Aggregates Ltd | Administrative & support | 2017 |
| Needham Eco-Glazing Consultants Ltd | Wholesale & retail | 2016 |
| Needham Holdings (Rotherham) Limited | Real estate | 2018 |
| Neemac Ltd | Real estate | 2021 |
| Neil Hammond & Sons Plastering Limited | Construction | 2013 |
| Neko Limited | Wholesale & retail | 2025 |
| Neliva Limited | Transport & logistics | 2015 |
| Nelly Inns Ltd | Hospitality | 2022 |
| Nelson BO Construction Limited | Construction | 2026 |
| Nelson Residentials Ltd | Households | 2024 |
| Nelson Wholefoods Ltd | Wholesale & retail | 2025 |
| Nemesis Gym Limited | Other services | 2002 |
| Neoncare Ltd | Health & social care | 2025 |
| Neontek Ltd | Wholesale & retail | 2024 |
| Nepe Ltd | Transport & logistics | 2021 |
| Nerf Action Xperience Holdings Ltd | Arts & recreation | 2022 |
| Nerfax Retail UK Ltd | Wholesale & retail | 2021 |
| Nesa Moor Ltd | Wholesale & retail | 2023 |
| Nestral Ltd | Information & communication | 2025 |
| Netmyhouse Limited | Real estate | 2008 |
| Netpaq I.T. Limited | Information & communication | 1999 |
| Neumann Segers Ltd | Other services | 2015 |
| Neuroinclusive Futures CIC | Professional & scientific | 2025 |
| Nevaeh Beauty Limited | Arts & recreation | 2024 |
| New Art School Ltd | Administrative & support | 2016 |
| New Beat CIC | Arts & recreation | 2026 |
| New Beginnings 4D Ltd | Health & social care | 2025 |
| New Citadel Management Company Limited | Real estate | 2023 |
| New City Services Limited | Real estate | 1985 |
| New Concept Building Solutions Ltd | Construction | 2017 |
| New Country Inns Limited | Hospitality | 2014 |
| New Dynasty Restaurant Limited | Hospitality | 2026 |
| New Forward Care Limited | Health & social care | 2020 |
| New Homes Mortgages Admin Limited | Financial services | 2021 |
| New Homes Mortgages Ltd | Financial services | 2019 |
| New Hope CC Ltd | Other services | 2026 |
| New Hope Christian Church | Other services | 2019 |
| New Leaf Door Solutions Ltd | Construction | 2024 |
| New Pitstop Carwash Limited | Other services | 2019 |
| New Start Residential Ltd | Real estate | 2010 |
| New Style Barber S66 Ltd | Other services | 2026 |
| New Wave ATM Installations Limited | Administrative & support | 2012 |
| New York Bagel Company Limited | Professional & scientific | 2022 |
| New York Bakery Company Limited | Professional & scientific | 2019 |
| New York Hand Car Wash Ltd | Administrative & support | 2019 |
| Newland Engineering Consultancy Ltd | Professional & scientific | 2023 |
| Newlife Building Services Limited | Construction | 2025 |
| NEX7 Analytics Limited | Information & communication | 2026 |
| Nexauratransport Ltd | Transport & logistics | 2025 |
| Nexaworks AI Limited | Information & communication | 2025 |
| Nexfone Ltd | Wholesale & retail | 2026 |
| Nexlura Ltd | Wholesale & retail | 2025 |
| Nexo Handyman & Home Services (UK) Limited | Construction | 2025 |
| Next - GEN Systems Ltd | Construction | 2022 |
| Next Generation PUB Co Ltd | Hospitality | 2023 |
| Next Level ME Ltd | Arts & recreation | 2019 |
| Next Level Training Camps Limited | Arts & recreation | 2019 |
| Next Nova Ltd | Real estate | 2022 |
| Next Path Limited | Wholesale & retail | 2020 |
| Next Step Business Limited | Wholesale & retail | 2025 |
| Nextopen Limited | Construction | 1990 |
| Nextserve.Ai Ltd | Information & communication | 2026 |
| Nexus Automotive Ltd | Wholesale & retail | 2024 |
| Nexus Digital Design Limited | Manufacturing | 2018 |
| Nexus Multi Academy Trust | Education | 2016 |
| NFS Ltd | Financial services | 2008 |
| NGB Installations Ltd | Manufacturing | 2017 |
| NGJ Ltd | Professional & scientific | 2015 |
| Ngueteu Ltd | Health & social care | 2018 |
| NGW Holdings Limited | Wholesale & retail | 2018 |
| NGZ Trans Ltd | Transport & logistics | 2023 |